Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 443
ere on a 50-volt circuit;.5 ampere on 110-volt; and .25 ampere on 220-volt circuit,the resistance of the filament increasing with the voltagewhen the candle power is constant. For any particular volt-age the higher the candle power of the lamp the larger thearea of its filament, the less its… … Fig. 383.—Incandescent Lampand Retaining Socket. ELECTRIC LIGHTING. 425 since the temperature rises with the increased current, and thelife of the lamp is shortened. Fur example, if the filamentof a 110-volt lamp has such a resistance that it will carryone-half ampere, without a dangerous rise in…
Electricity · Magnetism
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